Hex #399bbd or rgb(57,155,189) in RGB space is the tint of bluish cian. It has hue angle of 195.45 degrees, value = 74 and saturation = 70. #399bbd can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of magenta, 3 drops of blue, 4 drops of cyan.
Nearest safe hex - #3399cc. Below you can see the block with #399bbd color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #399bbd to the mixer and play with it.